Fabric pinking or notching mechanism



Jne-5, 1934. :M'ANN 'FABRIC PINKING OR NGTCHING MECHANISM Filed April1o. 1935 f 7 sheets-shea 1 7a Mann June 5, 1934. J, MANN 1,962,023

FABRIC PINKING OR NOTCHING MECHANISM Filed April 1o, 1933 7 sheets-sheet2 I Al June 5, 1934. J. MANN FABRIC PINKING OR NOTCHING MECHANISM 7sheets-sheet 3 Filed April lO, 1933 DNI June 5, 1934. J. MANN 1,962,023

FABRIC PINKING OR NOTCHING MECHANISM Filed April 1o. 1935 7 sheets-sheet4 y l f Q w a N 1 Er l f Eri;

"M Nvu@ l y s N l Joseyh Mann www 1953 7 sheets-shea 5 .n 1, W L w y mE@ -5 ai n MJ `U m @M m .M D 1 n J. MANN FABRIC PINKING OR NOTCHINGMECHANISM Filed yApril lO June 5, 1934.

FABRIC PYINKING OR NOTCHING MECHANISM Filed April 1o, 1935 7lsheets-sheet e @Hoc/wey June 5, 1934. J, MANN FABRIC PINKING oaNoTcHING MECHANISM Filed April l0, 1935 7 SheetS-Sheet 7 c'oAcr//vc roFEED WOR/1* Jig.

BA C'h KNIFE CU?" Silo-nul Patented June 1934 PATENT oFF-lcs mismorrmrmc on No'rcnnm mecum Joseph'Mann. Philadelphia,

mesne assignments, to

Ps.. assigner, by Lewis Invisible Stitch Machine Co., St. Louis, nApplicaties spru 1o, 19:3, sei-w No. am sz clam. (cl. 1s4-11si Theinvention relates to mechanism for edgenotching or pinking fabrics. I amaware that mechanisms have heretofore been proposed-foraccomplishment-of the purpose mentioned but I all such devices oi' whichI have knowledge have4 been limited in efilciency because of the type oipink cutting meansemployed therein.4 Some such devices have sought toemploy 4rotary cutters ,having continuous zig-zag cutting edges lto l bepresented tothe work. and othersvhave employed reciprocating cutters ofthe V-shapedA type which effect acomplete cutting of a pink or notcheach time the cutter isbrought into engagement with the work. Theemci'ency of 1li pinking or notching devices of the character abovementioned is materially impaired because of the shape of the cuttersandvlthe resulting difficulty in maintaining the cutting edges thereof. dulysharp.` vIt istrueV also thatwhen cutters of this character become evenpartially dulled it is impossible to make# clean i cutsv a-t the depthof the pinks or the anglesV defining notches.

t It is therefore an `object of my invention to 2,5 vprovide a simpleand efiicient fabric pinking or notching mechanismin which is employednovel means. for making individual` successive cuts bearing angularrelation s o as to provide the desired pinked or notched formation andin- 3o cluding `simple relatively` inexpensive and easily sharpenednat-type cutter elements.

lAnother object of the invention is to provide a fabricpinkingor-notching mechanism employing individual cutter elements ofthef nat type inwhich the parts are so constructed `n .ncl cooperativelyarranged that the individual Vcuts which form the pinks ornotches arecausedto intersect inthe angles the notches or pinks and thus assureclean cut- Another object of the invention is to provide a" novel fabricpinking. or notching mechanism embodying a. vfabric supporting base,fabric feeding means and a pinking or hatching: unit `'4s mountableonand removable as a unit from the supporting base and which is bodilyshiftable' for varying the depth lof the pinks or`notches. Anotherobject of the invention is to provide a novel fabric lpinking ornotching mechanism embodying individual successively active cuttingelements andI ledger blade equipment cooperating therewith,v and meansforyieldably holding said elements in engagement with the associatedAledger blade equipment during the cutting acss `tion to assure anemcient shearing relation.

-will more fullir appear.

defining the depth of tion of the work supporting base.

ving. being shown in section.

Another object of the inventionis to provide a novel fabric pinking ornotching mechanism embodying 4coasting reciprocating cutting elements,and driving means for said elements including clutch devices for lelements and locking said elements in a predetermined position whensilenced.

With these and other objects in view which the nature'of the in-`vention will be more clearly understood by folc5 lowingthedescriptiomthe appended claims, and the several views illustrated inthe accompanying drawings.

Figure 1 is a front elevation illustrating the 7o invention applied to asewing machine.

Figure! is arear elevation of the parts shown in'Figure 1.

mgureaisaplanviewofthepartsshown in Figure i, the overhanging arm beingbroken 7s `Figure4issninverted-planci'.thepertsshown Figure 1.`

Figure isa left hand end view of the pinking or .notching attachment.portions ofthe so work supporting base and work feeding means beingshown in dotted line phantom.

Figure 6 is adetail perspective view illustrating one cutter element,its mounting and its driving connection. as

. Figure v is a detail Perspective view of a cutter element. f l

Figure 81s a detail perspective view ofjal portion of the pinking or-nog attachment base and illustrates -the ledgerblade equipment.

Figure 9 is an inverted perspective view ot the base portion shown inFigure 8. v

Figure 10 is a vertical cross section taken the line 10-10 on Figure 3.

-Figure l1 is a detail horizontal section taken 96 on the line 1l1l onFigure il. Figure 12 is a detail perspective view illustrat- `ing theguard and guide unit.v

Figure V13 is a detail perspective view of a por- Figure 145 is a planview of onecutter element and the pivotal mounting therefor, said moimt-Figures 15, 16. 1 7, and 18 are tic sectional views illustrating fourevents of the 10| cycle of operations-enectivc in forming one comj pletepink ornotch: namely. a feed step. front blade cut, a second feed step,and the back blade cut.

419 is a :diagrammatic plan view illus- 110 silencing said cutter sotrating the position of parts shown in Figure 16.

Figure 20 is a diagrammatic plan View illustrating the position of partsshown in Figure 18.

Figure 21 is a diagrammatic plan view illustrating a completed pinked ornotched work portiontjv f Figure- 22 is a view-1' diagrammaticallyillus'- trating the timed relation of the feed steps and the individualpink forming cuts.

Like numerals of reference designate corresponding parts throughout theseveral figures of the drawings. 5

In this particular disclosure of the invention I have shown my improvedmechanisms applied to use on a conventional "sewing machine but it is tobe iuiderstood that the work supporting base, the work feeding means,and the power source for driving the feeding means afforded by thesewing machine all are merely'exemplary `shdvvingsand may take variousforms other than custornaijysewing machine construction within thescopefof the invention as particularly pointed out yinthe appendedclaims.' No claim is made herein tothe'combination of pinking means andseaming'means, claims to that combination being made' inm'y co-pendingapplication filed April 1Q, 1933, Serial No. 665,435. j

`v Inthe d'ra'wings, 5 designates theframe base ogrfwork, support of asewing machine which in- ,cludesj the usual frame standard 6 supportinganvloverhanging arm 7 and the sewing head 8 mounted on the free end ofsaid arm. A main shaft 9 is rotatably mounted in the overhanging ,armandserves as a source of power for driving vthe work feedingy means andthepinking means scontobe described. A throat plate 10 is mounted on thework support base 5 andis slotted as at lil to accommodate theintermittent 4-motion feed dog 12 to` which feed movement is imparted bydevices generally designated 13, and to which lift movement is imparted`by devices generally. designated 14, said devices 13 and 14 having theusual connection with the rotary shaft 9 as indicated in dottedlines inFigures 1 and 3 of the drawings.' See also Figure (4. A presser foot 15cooperates with the feed dog 12 inl the usual manner.

All of the parts above described will be recognized as conventional,except insofar as they combine with the pinking mechanism to bedescribed hereinafter, andthe details of construc- /tion' of these partsform no part of my present invention. v

In the practical development of my invention, I provide a base plate16which is longitudinally slotted as at 17 to receive the clamp screws 18by which it may be removably secured upon the work support base 5 asillustrated in Figures 1, 3 and 10 of the'drawings. A longitudinalkeyway 19 .is formed in the under face ofthe base plate 16 to receivetheguide key 20 secured to and projecting upwardly from the work supportbase 5. See Figures 3, 5 and 10.

, The base plate 1 6 includes an extended nose portion21 having acut-out as indicated at 22 to provide operating clearance for thepinking cutters to be described in detail hereinafter,V and the fingersdefining .this cut-out are recessed as at 23 to removably receive ledgerblades 24 d's- "posedin angular relation as illustrated inFigures 3, 8and 9.

The fingers forming the end of the base plate nose 21 and defining ,thenose cut-out '22 also form abutment shoulders 25 which co-operate withthe abutment boss 26 depending from said nose portion 21 to limitshifting movement of said base plate in a manner soon to be described.See Figures 8, 9 and 15.

The boss 26 depending from the base plate nose portion is slidable in arecess 27 formed in the upper surface of the work supporting base 5 andthe throat plate 10 is cut out as at 28 to receive the abutment shoulderportions 25 of the nose portion and to provide a suitable abutment ormovement limiting face 29 to be engaged by said abutment shoulders. Theright hand end of the recess 27 serves a like purpose in engagng theadjacent portion of the boss 26 and by this equipment the degree ofmovement of which the base plate 16 is capable toward and away from thefeed mechanism or work guide line, is suitably limited. The limitingstop shoulder formed by said recessed portion is indicated at 30. SeeFigure 13.

My improved pinking mechanism preferably is in the nature of a unitattachment, its component parts being mounted wholly upon and bodilymovable with the base plate 16. By shifting the base plate along itsguided mountings and between the stop limits hereinbefore described, itis possible to vary the distance of the lne of pinking from the feedmechanism or `work guide line, to vary the depth of the pinks orvnotches, or to vary both said distance and said pink or notch depth. Forthis purpose, I have provided means for effecting the shifting of saidbase plate 16. This means comprises an angled shifter lever 31 which ispivoted at 32 to the work supporting base 5 and link-connected as at 33to the base plate 16. See Figures 1 and 3.

A forked bearing standard 34 isv secured as at 35 upon the base plate 16and in its forked arms are provided bearings 36 for'rotatably receivinga horizontally disposed jack shaft 37. A large gear 38 is mounted on thejack shaft 37 and with the small gear'39 mounted on the driver shaft 40to form a part of a 1-to-2 ratio gear couple for imparting to the jackshaft 37 one rotation for each two rotations of the main shaft 9.

It will be observed by reference to Figures 2 and 3, that the drivershaft 40 parallels the main shaft 9 and has rotative bearing at one endin a bearing 41 secured as at 42 to the forked standard 34 and its otherend in a bearing 43 supported onv a standard 44 secured as at 45 uponthe base 16. `Rotation is imparted to the driver shaft 40 through themedium of a toothed pulley 46 mounted on the end thereof and driven by abelt 47 from a like size pulley 48 secured upon the main shaft 9. Thebelt 4'7 is of course suiciently flexible to permit the slight shiftingmovements of the base plate 16 without in any way effecting driving ofthe cutting devices from the main shaft 9. l

In order to permit silencing of the pinking structed that when it isshifted to effect silencing of the pinking mechanism operation it servesto lock vthe pinking cutters in a predetermined inoperative position,and, upon reclutching, to

' assure a, reestablishing of the desired timed relation betweenthe'work feeding means and the recipr'ocati'onsl of the cuttingelements.

The clutching devices above referred to include a driver hub 49 securedas at-50 upon the driver l The shaft 40 and including a driving flange51.

sleeve 54 slidably mounted on the hub 49. `It

will be understood that the pulley 46 is looselyv mounted on` the endofthe driver shaft 40 and imparts its rotation tothe flange 51, hub 49and shaft 40 `only when the driver pins 53 are re-r ceived in thesockets as illustrated in Figures 2 and 1l of the drawings. .When the'sleeve 54 is shifted to withdraw the driver pins 53 `from the pulleysockets 55 the pulley 46 may rotate freely about the driver shaft 40without imparting rotation thereto.

It willbe observed `by reference to Figures 2 and 11 of the drawingsthat the sleeve 54 also carries a lock pin 56 which enters a socket57 ina stationary or stop collar 58 supported upon the standard 44 each timethe clutch sleeve 54 is shiftedto the pinker unit silencing positionthereby serving to lock the shaft 40, and consequently thel pinkingcutters, stationary. The single lock pin receiving socket 57 is sopositioned with relation tothe pinker unit cutting elements and `thedriving means therefor that said cutting elements will, upon silencingof the pinking mechanism, always be locked stationary in the elevatedhorizontally alined position. The driver pins 53 are ynot diametrically`oppositely disposed, one thereof being slightly below an imaginary lineintersecting the axis of the shaft 40 and the `axis of the companionpin. For this reason it is necessary, after releasing the pins 53 fromdriving relation with the pulley sockets 55, to make a completerevolution of the pulley 46 before the pins and sockets willagainregister. Thus reestablishment of the timed relation between the workfeeding means and the cutter element reciprocations 4is assuredeach timethe clutch is shifted to throw the pinking unit into' operation.

To provide for proper shifting ofthe clutch sleeve 54 the sleeve isgrooved as at 59 to receive a forked shifter 60 carried by a shifter rod61 slidable in a bearing 62 provided in the standard` 44said rod being`link-connected as at 63 to .a shifter lever 64 pivoted as at 65 on thework support base5 and through `the medium of which shifting of .theclutch sleeve 64 may easily be effected. i

My improved cutting devices'which are supported upon the base plate 16and driven by connections described above include a pair of eccentrics66 secured in` spaced relation on the jack shaft 37. It being desiredthat the cutting elements should reciprocate alternately, the

`eccentrics 66 are arranged 180 degrees apart in the direction of theirrotation and thus as the cutting element driven by one eccentric isadvanced toward the work the companion cutting element will be` movedaway from the work.

The pinking or cutting members each comprises a carrier arm 67 securedas at 68 on a `pivot stud 69 having pivot bearing in a sleeve bearing 70removably secured as at 71 upon" the base plate. 16. i n

Each carrierarm pivot stud 69 has a reduced -end 72 slidable through aplug screw 73 secured inthe end of the `respective sleeve bearing 70,

which reduced end forms a shoulder 74. A coil spring 75 is interposedbetween each lshoulder 74 and its associated `plug screw 73 andtends toforce the stud in a direction of its axis in a mannercausing the cuttingelement carried by the respective arm 67 to be yieldably held againstthe ledger blade with which it is associated, assuring the rotationimparted to the jack shaft 42 .isv

transmitted in the form of oscillatory movement to the pivotally mountedcarrierarms 67. See Figures 1, 3, 5, 6 and 14.

At its free end eachof the pivoted carrier arms 67 is recessed as at 79to receive a cutter element and is slotted as at 81 to receive a screw82, said screw being adapted to pass through` the slot and enter a tap83 formed in the particular cutter element 80 to receive it. 'By thismeans the cutting elements 80 are secured to the ends of the carrierarms 67 in a manner permitting a degree of upand down adjustment ofsaidelements relative to said carrier arms.

As will be apparent by reference to Figures 6 and 7 of the drawings,each of the cutter elements 80 includes aflat wall 84 having a portionthereof terminating in an angled and beveled cutting edge 85 and anotherportion thereof extended downwardly as indicated at 86 to form a guidefinger which engages an associated ledger blade while the wall portionproper 84 is lifted out of engagement therewith. As hereinbeforedescribed the flat continuous wall portions 84, 86 are yieldably held inengagement with the cooperating surface of the respective ledgerblade-24 by the associated spring equipment 75 to assure emcientshearing relation of the ledger blade and the cutting edge 85 duringpinking.

In order to facilitate feeding of the work to the pinking means and toprotect thev hands of the workers from contact with the reciprocatingcutters, I provide a combined guard and guide unit disclosed in detailin Figures 3 and 12 of the drawings. This unit includes a base plate 87which is secured to the work supporting base 5- by a single screw meansas indicated at 88, the base plate 87 being provided with a curvedpositioning shoulder 89 which engages the adjacent upstanding shoulderpresented by the throat plate 10 thus rendering additional securingmeans 1 91, it is possible to guide the work to the pinking imechanism,'and the flange 90 serves efliciently to guard against contactwith the reciprocating cutting elements.

In the foregoing description I have discloseda simple and eicientpinking machine in which the pinking mechanism is constructed in theform of a unit shiftable bodily to vary the distance of the pinked edgefrom the feeding mechanism or work guide line `or to vary the depth ofthe pinks and which includes simple individual alternately reciprocatedpinking or cutting elements of the flat type easily sharpened, andclutch equipment by which the pinking mechanism may be silenced at thewill of the operator and in a manner for locking the cutters in theinoperative position and for assuring reestablishment of the desiredtimed relation of the work feed mechanism and thev cutter elementreciprocations when the clutch is again shifted to the operativeposition. i The cutting elements vbear such relation and the parts areso operated that the cutter elements form successive cuts bearingangular` relation and cooperating to form the pinks, provision alsobeing made for causing the successive cuts to intersect slightly andthereby assure clean cutting of the fabric in the angles defining thedepth of the pinks.

The mechanisms which impart movement to the intermittent or step-by-stepwork feeding means and the pink cutting means from the common powersource or power shaft 9 are so related or synchronized that the cutseffected alternately and successively by the individual cutter elementseach take place during a rest interval of the work feeding means.

Means may be provided for varying the length of the feed steps impartedto the work by the feeding mechanism and by this means of the pinks andthe degree to which the successive cuts intersect at the angle definingthe depth of the pinks may be varied. This feed step adjusting means isgenerally indicated at 94 and may be of anyapproved type. This form ofsewing machine work feed adjustment being conventional and well known toworkers in the art, it is considered unnecessary to disclose thestructure thereof in detail. One simple form of such mechanism isdisclosed in detail in the patent issued to lE. B. Allen, April 18,1899, and identified by Num- Obviously any approved form of.

ber 623,271. K such mechanism may be l As has been describedhereinbefore, the clutch can be shifted to silence the pinking mechanismonly when the -pin 56 and socket 57 register, at which time the cuttingedges 85 are raised out of cutting position a like distance, or in.other words, are horizontally alined.

I will -now describe briefly the employed.

operation of my pinkingmachine presuming .the parts to be in-k theposition described in the preceding paragraph. In this description Imake reference to front and back cutting elements. By front element Iconsider the cutting element firstencountered by work being advanced inthe direction of the arrow A in Figure 3. The front cutting elementtherefore is the cutting element lowermost in Figure 3 of the drawingsand the back cutting element `is the cutting element nearest the top ofFigure 3. With the parts in the position stated, and the power shaft 9moving in the direction indicated by the arrows on Figure 3, the firstevent in the cycle of operations isa feed step of the work or fabric.See Figure 15. Just before the shaft 9 completes a half turn thedownwardly moving front knife starts to make its cut in the edge of thefabric, as indicated in Figure 16. At this time the back knife is movingupwardly. During the next half turn the cutter elements reverse theirldirection of travel and return to their position ofalinement abovereferred to. It will be remembered that the jack shaft 37 makes onerevolution for each tworevolutions of the main shaft 9.

With the cutting elements elevated, the fabric is given another stepfeed as indicated 'in Figure j 17 and during the second'revolution ofthe main shaft 9, the above sequence of operationis rethe cycle ofoperations forming a single pink or edge notch in the fabric may besummarized as including four events, namely, (1) fabric feed the depth,

step, (2)front element cut, 3) fabric feed step, and (4) back elementcut.

This sequence of operation is illustrated in comparative diagram inFigure 22 of the drawings. In :this figure the line FS indicates tworevolutions of the main or power shaft 9 and the two feed steps whichoccur during said revolutions. Beneath the line FS is a line JSrepresenting a singlerevolution of the jack shaft 3'7 which occursduring the two revolutions of the shaft 9. Traversing the line JS I havediagrammatically indicated the front and back knives and the approximateintervals at which 'they individually make their cuts.l

It is of course to be understood. that the details of structureandarrangements of parts may be variously changed and modified withoutdeparting'from the spirit and scope of my invention. I claim;-

1. In pinking mechanism, intermittently actuated work feeding means forfeeding work stepby-step, pink cutting means including movable vshearingblade and stationary ledger blade equipment, and means to move saidcutting meansl to form successive individual cuts bearing angularrelation and cooperating to form said pinks, the successive cuts-beingformedv during successive rest intervals of said' feeding means.

2. In pinking mechanism, work feeding means, and pink cutting meansvoperable to form successive cuts in the edge of the workA bearing angu-4lar relation, said work feeding means serving to feed the work-in timedrelation to said, cutting means whereby Ato cause said successive cutsto intersect at the angle defining the depth of said pinks.

3. In pinking mechanism, ledger blade equipment, pink cutting means,means to move said cutting means into and out of engagementwith saidledger blade equipment to form successive cuts bearing angular relationand cooperating to form said pinks, and means to yieldably hold saidcutting means against said ledger blade lequipment during-themaking ofsaid successive cuts.

4. In pinking mechanism, ledger blade equipment, pink cutting means,means to move said cutting means -into4 and out of engagement with saidledger blade equipment to form successive intersecting cuts bearingangular relation and cooperating to form said pinks, and means toyieldably hold said cutting means against said ledger blade equipmentduring the making of said successive intersecting cuts. y y

5. In pinking mechanism, Work feeding means, ledger blade equipment,pink cutting means engageable with said ledger blade equipment to formsuccessive cuts in .the edge of the work bearing angular relation, saidwork feeding means serving to feed thew'ork in timed relation to, saidcutting means whereby to cause said successive cuts to intersect at theangle defining the depth of said pinks, and means to yieldably hold saidcutting means against said ledger blade equipment during the making ofsaid successive cuts. 6. In pinking mechanism, individuallyreciprocablevpink'cutters', and means to reciprocate thegcutters to form successive cuts bearing angular relation and cooperatingto form saidpinks.

' 7. In pinking mechanism, individually reciprocable pink cutters,andmeans to reciprocate the'cutter's izo-formv successive intersectingcuts bearing angular lrelation and cooperating to form said pinks.

' 8. In pinking mechanism, intermittently actuated work feedingmeans for-feeding work stepby-step, individually reciprocable pink cutters, andmeans to reciprocate the cutters to form successive cuts bearing angularrelation and cooperating to form said pinks, the successive cuts beingformed during successive rest intervals of said feeding means.

9. In pinking mechanism, work feeding means, and individual pink cuttersreciprocable to form successive cuts in the edge of the work bearingangular relation, said work feeding means serving to feed the work intimed relation to said cutter reciprocations whereby to cause saidsuccessive cuts to intersect at the angle defining the depth of saidpinks.

10. In pinking mechanism, ledger blade equipment, individualreciprocable pink cutters, means to reciprocate said cutters into andout of engagement with said ledger blade equipment to form successivecuts bearing angular relation and cooperating to form said pinks, andmeans to yieldably hold said cutters against said ledger blade cuts.

11. In pinking mechanism, ledger blade equipment, individualreciprocable pink cutters, means to reciprocate said cutters into andout of engagement with said ledger blade equipment to form successiveintersecting cuts .bearing angular relation and cooperating to form saidpinks, and means to yieldably hold said cutters against said ledgerblade equipment during the making of said successive intersecting cuts.

12. In pinking mechanism, Work feeding means, ledger blade equipment,individual reciprocable pink cutters, means to reciprocate said cuttersinto and out of engagement with said ledger blade equipment to formsuccessive cuts in the edge of the work bearing angular relation, saidequipment during the making of said successive work feeding meansserving to feed the work in timed relation to said cutter reciprocationswhereby to cause said successive cuts to intersect at the angle definingthe depth of said pinks, and means to yieldably hold said cuttersvagainst said ledger blade equipment during the making of said successivecuts.

' lf3. In pinking mechanism, intermittently actuated work feeding meansfor feeding work stepby-step, pink cutting means, means to move saidcutting means to form successive cuts bearing angular relation andcooperating to form said pinks, 4the successive cuts being formed duringsuccessive rest intervals of said feeding means,

and means to adjust the feeding means to vary the length of feed stepseffected thereby.

14. In pinking mechanism, Work feeding means, pink cutting meansoperable to form successive cuts in the edge of the work bearing angularrelation, said work feeding means serving to feed the Work in timedrelation to said cutting means whereby to cause said successive cuts tointersect at the angle defining the depth-of said pinks, and means toadjust said feeding means to vary the degree of intersection of saidcuts.

15. In pinking mechanism, intermittently actuated Work feeding means forfeeding work stepby-step, individual reciprocable pink cutters, means toreciprocate the cutters to form successive cuts bearing angular relationand cooperating to form said pinks, the successive cuts being formedduring successive rest intervals of said feeding means, andmeans toajust the means, individual pink cutters reciprocable to form successivecuts in the edge of the work bearing angular relation, said work feedingmeans serving to feed the work in timed relation to said cutterreciprocations whereby to cause said successive cuts to intersect at theangle defining` the depth of said pinks, andmeans to adjust said feedingmeans to vary the degree "of intersection of said cuts.

17. In pinking mechanism, a work supporting base, work guiding means, apinker unit mounted on said base and including pinking means, and meansto bodily shift the position of the pinker unit to vary the distancebetween ,the pinking means and the guiding means, said pinker unit andsaid base having cooperating key and keyway equipment for guiding saiddistance varying movement.

18. In pinking mechanism, a Work supporting base, work guiding means, apinker unit mounted on said base and including pinking means, and leverand link connections between said unit and said base to bodily shift theposition of said unit to vary the distance between the pinking means andthe guiding means.

l 19. In pinking mechanism, a work supporting base, work guiding means,a pinker unit mounted on said base and including pinkingmeans, and leverand link connections between said unit and said base to bodily shift theposition of said unit to vary the distance between the pinking means andthe guiding means, said pinker unit and said base having cooperating keyand keyway equipment for guiding said distance 1 varying movement.

20. In pinking mechanism, a pair of alternately reciprocable pinkcutting blades, and driving means for reciprocating the blades andincluding clutch means enabling silencing of the cutting means andembodying devices interengageable upon silencing of the cutting means tosecure a predetermined stationaryvpositioning of said cutting means.

21. In pinking mechanism, reciprocable pink cutting means,intermittently actuated work feeding means for feeding AWorkstep-by-step, and driving means for reciprocating the cutting means andactuating said feeding means in cooperative timed relation and includingclutch means enablingsilencing of the cutting means p I to coact informing pinks.

23. In a pinking machine, a work supporting base, a jack shaft rotatablymounted adjacent the base, individual reciprocably mounted pinkerknives, and means including eccentric and pitman and strap connectionsbetween the jack shaft and said knives. A

, 24. In pinking. mechanism, intermittently actuated work feeding meansfor feeding work step-by-step, reciprocable pink cutting means,

driving means for actuating said feeding means and said cutting means intimed relation, and clutch means for silencing said cutting meansdisengageable from driving connection with said driving means only whensaid cutting means is elevated out of active cutting position.

25. In pinking mechanism, intermittently .actuated work feeding meansfor feeding work step-by-step, reciprocable pink cutting means, drivingmeans for actuating said feeding means and said cutting means in timedrelation, and clutch means for silencing said cutting meansdisengageable from driving connection with said driving means only whensaid cutting means is elevated out of active cutting position andincluding means to lock said cutting means in silenced position.

26. In pinking mechanism, intermittently actuated work feeding meansforfeeding work step-by-step, reciprocable pink cutting means, drivingmeans for actuating said feeding means and said cutting means in timedrelation, and clutch means for silencing said cutting meansdisengageable from driving connection with said driving means only whensaid cutting means is elevated out of active cutting position andincluding means to lock said cutting means in silenced position, anddevices coacting upon restoration of the clutched condition to assurereestablishment of the timed relation of the feeding and the cuttingmeans.

27. In pinking mechanism, a work supporting base, work guiding means, apinker unit mounted on said base and including pinking means, means tobodily shift the position of the pinker unit to vary the distancebetween the pinking means and the guiding means, and means to limit theshifting of said unit toward and from said guiding means.

28. In pinking mechanism, a work supporting base, work guiding means, apinker unit mounted on said base and including a base plate and pinkingmeans, and means to bodily shift the position of the pinker unit to varythe distance between the pinking means and the guiding means, said worksupporting base having a recess therein forming stop shoulders, and saidbase plate having an extension depending in said recess -and includingabutment elements engageable with the stop shoulders to limit shiftingof said unit.

29. In pinking mechanism, a work supporting base, a rotatably mountedjack shaft, means for imparting rotation to the jack shaft, individualreciprocable pink cutters, and means actuated by the jack shaft forreciprocating the cutters to form successive intersecting cuts bearingangular relation and cooperating to form said pinks.

30. In pinking mechanism, a work supporting base, a rotatably mountedjack shaft, means for imparting rotation to the jack shaft, individualreciprocable pink cutters, means actuated by the jack shaft forreciprocating the cutters to form successive cuts bearing angularrelation and cooperating to form said pinks, and means to feed workstep-by-step in timed relation to said cutter reciprocations to causesaid successive cuts to intersect at the angle defining the depth ofsaid pinks.

31. In pinking mechanism, a work supporting base, a rotatably mountedjack shaft, means for imparting rotation to the jack shaft,individualreciprocable pink cutters, and means actuated by the jack shaft forreciprocating the cutters to form successive intersecting cuts bearingangular relation and cooperating to form said pinks, and comprisingcutter driving eccentrics on the jack shaft one for each cutter, and apitman and strap connecting each cutter with an associated eccentric.

32. In pinking mechanism, work feeding means for feeding workstep-by-step, a rotatably mounted jack shaft, individual reciprocablepink cutters movable alternately to form successive cuts bearing angularrelation and cooperating to form said pinks, cutter driving eccentricson said jack shaft one for each cutter, a pitman and strap connectingeach cutter with an associated eccentric, and means for impartingrotation to the'jack shaft in timed relation to the feeding means tocause the cutters to move intocutting position only during positions ofrest of said feed means.

33. In pinking mechanism, work feeding means for feeding workstep-by-step, a rotatably mounted jack shaft, individual reciprocablepink cutters movable alternately to form successive cuts bearing angularrelation and cooperating to form said pinks, cutter driving eccentricson said jack shaft one for each cutter, a pitman and strap connectingeach cutter with an associated eccentric, means for imparting rotationto the jack shaft in timed relation to the feeding means to cause thecutters to move into cutting position only during positions of rest ofsaid feed means, and clutch devices for silencing said cuttersinterposed in said means for imparting rotation to the jack shaft anddisengageable only when said cutters are elevated out of cuttingposition.

34. In pinking mechanism,vwork feeding means for feeding workstep-by-step, a rotatably mounted jack shaft, individual reciprocablepink cutters movable alternately to form successive cuts bearing angularrelation and cooperating to form said pinks, cutter driving eccentricson said jack shaft one for each cutter, a pitman and strap connectingeach cutter with an associated eccentric, means for imparting rotationto the jack shaft and for driving the feeding means in cooperative timedrelation to cause the cutters to move into cutting position only duringpositions of rest of said feed means, and clutch devices for silencingsaid cutters interposed in said means for imparting rotation to the jackshaft and disengageable only when said cutters are elevated out ofcutting position, said clutch devices including means to lock thecutters in the position at which they are silenced and for yassuringreestablishment of the timed relation with the feeding means when thesilenced condition is discontinued.

35. In pinking mechanism, ledger blades bearing angular relation,individual reciprocable pink cutters movable alternately into and out ofengagement with the ledger blades to form successive cuts bearingangular relation and cooperating to form said pinks, a jack shaft,cutter driving eccentrics on said jack shaft one for each cutter, apitman and strap connecting each cutter with an associated eccentric,and means to yieldably hold each cutter against its associated ledgerblade While in cutting engagement therewith.

36. In pinking mechanism, a work supporting base, means to feed workover the base, work pinking means operable in timed relation to the workfeeding means, and a guard and guide unit mounted on said base inposition for guarding said pinking means and for guiding work being fedby said feeding means.

37. In pinking mechanism; a work supporting base; means to feedI workover the base; work pinking means operable in timed relation to the workfeeding means; and a guard and guide unit comprising a base platemountable on and removable from said work supporting base, a guardflange upstanding in position to guard operation of said pinking means,and an upstanding` guide flange for guiding work being fed by saidfeeding means.

38. In pinking mechanism; a work supporting n base; means to feed workover the base; work pinking means operable in timed relation tothe.

work feeding means; a guard and guide unit comprising a base platemountable on and removable from said work supportingr base, a guard.Y

' flange upstanding in position to guard operation of said pinkingmeans, and an upstanding guide flange for guiding work being fed by saidfeeding means; a supporting arm carrying said guide flange and swingableto move said guide flange into or out of effective position; and meansto adjustably support the guide flange on the supporting arm to enableadjustment of the guiding relation between the guide ange and thefeeding means.

40. In pinking mechanism, a work supporting base, a main rotary shaft, aWork guide, and a pinker unit including a base plate slidably guided onand supported by the work support base, pinking means, means foroperating the pinking means including a jack shaft and a driver shaftrotatably supported on the base plate, means for connecting the driverand jack shafts in driving relation, said driver shaft lying parallelthe main rotary shaft, pulley and belt equipment connecting the drivershaft and the main rotary shaft in driving relation, and means to bodilyshift the position 'of the base plate to vary the distance between theWork` guide and the pinking means. ,l

4l. In pinking mechanism, a Work supporting l base, a main rotaryshaft,l Work feeding means driven from the main rotary shaft, and apinker unit including a base plate slidably guided on and supported bythe work support base, pinking means, meansfor operating the pinkingmeans in timed relation to the Work feeding means including a jack shaftand a driver shaft rotatably supported on the base plate, means forconnecting the driver and jack shafts in driving relation, said drivershaft lying parallel the ma'in rotary shaft, pulley and belt equipmentconnecting the driver shaft and the main rotary shaft in drivingrelation, and means to bodily shift the position of the base plate tovary the distance between the work feeding means and the pinking holdsaid ledger and cutter blades in shearing relation.

43. In pinking mechanism, a pair of spaced angularly disposedledgerfblades, a cutter blade associated WithV each ledger blade, apivotally mounted Vcarrier arm carrying each cutter blade, means tooscillate thearms'injtimed relation to form successive cuts cooperatinginfforming pinks, and means t'ofurgeeach 'arm laterallyto yieldably holdthe cutter blades in shearing relation to the ledger blades. 4 l y s 44.In pinking mechanism, a pailofy spaced angularly disposed ,ledgerblades, a cutter blade associated with each ledger blade;V a pivotallymounted carrier arm carrying each cutter blade, means to oscillate thearms in timed relation to form successive cuts cooperating in formingpinks, and means to urge each arm bodily laterally to yieldably hold thecutter blades in shearing relation to the ledger blades.

45. Inpinking mechanism, apair of spaced angularly disposed ledgerblades, a cutter blade associated with each ledger blade, a pivotallymounted carrier arm carrying each cutter blade, means to'oscillate thearms in timed relation to form successive cuts cooperating in formingpinks, and means to urge each arm bodily laterally to yieldably hold thecutter blades in shearing relation to the ledger blades, said last namedmeans comprising a pivot stud projecting from each carrier arm andhaving a reduced shank portion forming an abutment shoulder, a sleevebearing, for each pivot stud, a guide bearing for each shank portion andforming an abutmentV shoulder opposed to the stud abutment shoulder, anda spring interposed between the opposed abutment shoulders.

46. In pinking mechanism, a pair of spaced angularly disposed ledgerblades, a cutter blade of eccentrics on said shaft spaced 180 apart inthe direction of rotation of said shaft, and pitman and strapconnections between each eccentric and an associated carrier arm.

47. In pinking mechanism, a pair of cutting blades, and means toindividually move said blades whereby each blade movesalternately-oppositely to its companion blade to form successive cutsbearing angular relation and cooperating to form said pinks.

48. In pinking mechanism, a pair of cutting blades, `and means toindividually move said blades whereby each blade movesalternately-oppositely to its companion blade to form successiveintersecting cuts bearing angular relation and cooperating to form saidpinks.

49. In pinking mechanism, intermittently actuated Work feeding means forfeeding work stepby-step, a pair of pink cutting blades, and means toindividually move said blades whereby each blade movesalternately-oppositely to its companionblade to form successive cutsbearing angular relation and cooperating to form said pinks, thesuccessive cuts being formed during successive rest intervals of saidfeeding means.

50. In pinking mechanism, two cutter devices disposed in spaced andangular relation and each limited in operation to a single plane ofmove- 52. In pinking mechanism, two ledger blades disposed in spaced andangular relation, two cutter blades cooperative with said ledger bladesand each limited in operation to a single plane of movement, workfeeding means, and means to move said cutter blades to form individualcuts bearingangular relation whereby companion cuts form single pinks inthe edge of the work, said work feeding means serving to feed the workbefore and after each cut and remaining ineffective during the making ofeach out.

JOSEPH MANN.

